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https://github.com/alsa-project/alsa-lib.git
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big simple mixer update
- exported all necessary functions to create a mixer module outside alsa-lib
- separated simple mixer API from the simple mixer implementation
(using callbacks as usuall)
- src/mixer/simple.c is the core
- src/mixer/simple_none.c is the current (no-abstraction) implementation
based on control names; note that this module does not depend on
internal ALSA structures now
- src/mixer/simple_abst.c is the ongoing abstraction which will use
external dynamic modules; src/conf/smixer.conf will describe which
modules will be used depending on the components from the driver
This commit is contained in:
Jaroslav Kysela
parent
ae07fd40fb
commit
597b4d0942
12 changed files with 2270 additions and 1486 deletions
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@ -74,6 +74,18 @@ typedef int (*snd_mixer_elem_callback_t)(snd_mixer_elem_t *elem,
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typedef int (*snd_mixer_compare_t)(const snd_mixer_elem_t *e1,
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const snd_mixer_elem_t *e2);
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/**
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* \brief Event callback for the mixer class
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* \param class Mixer class
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* \param mask Event mask (SND_CTL_EVENT_*)
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* \param helem HCTL element which invoked the event
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* \param melem Mixer element associated to HCTL element
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* \return zero if success, otherwise a negative error value
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*/
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typedef int (*snd_mixer_event_t)(snd_mixer_class_t *class, unsigned int mask,
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snd_hctl_elem_t *helem, snd_mixer_elem_t *melem);
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/** Mixer element type */
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typedef enum _snd_mixer_elem_type {
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/* Simple (legacy) mixer elements */
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@ -88,6 +100,7 @@ snd_mixer_elem_t *snd_mixer_last_elem(snd_mixer_t *mixer);
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int snd_mixer_handle_events(snd_mixer_t *mixer);
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int snd_mixer_attach(snd_mixer_t *mixer, const char *name);
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int snd_mixer_detach(snd_mixer_t *mixer, const char *name);
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int snd_mixer_get_hctl(snd_mixer_t *mixer, const char *name, snd_hctl_t **hctl);
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int snd_mixer_poll_descriptors_count(snd_mixer_t *mixer);
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int snd_mixer_poll_descriptors(snd_mixer_t *mixer, struct pollfd *pfds, unsigned int space);
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int snd_mixer_poll_descriptors_revents(snd_mixer_t *mixer, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
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@ -108,6 +121,41 @@ void * snd_mixer_elem_get_callback_private(const snd_mixer_elem_t *obj);
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void snd_mixer_elem_set_callback_private(snd_mixer_elem_t *obj, void * val);
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snd_mixer_elem_type_t snd_mixer_elem_get_type(const snd_mixer_elem_t *obj);
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int snd_mixer_class_register(snd_mixer_class_t *class, snd_mixer_t *mixer);
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int snd_mixer_add_elem(snd_mixer_t *mixer, snd_mixer_elem_t *elem);
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int snd_mixer_remove_elem(snd_mixer_t *mixer, snd_mixer_elem_t *elem);
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int snd_mixer_elem_new(snd_mixer_elem_t **elem,
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snd_mixer_elem_type_t type,
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int compare_weight,
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void *private_data,
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void (*private_free)(snd_mixer_elem_t *elem));
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int snd_mixer_elem_add(snd_mixer_elem_t *elem, snd_mixer_class_t *class);
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int snd_mixer_elem_remove(snd_mixer_elem_t *elem);
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void snd_mixer_elem_free(snd_mixer_elem_t *elem);
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int snd_mixer_elem_info(snd_mixer_elem_t *elem);
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int snd_mixer_elem_value(snd_mixer_elem_t *elem);
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int snd_mixer_elem_attach(snd_mixer_elem_t *melem, snd_hctl_elem_t *helem);
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int snd_mixer_elem_detach(snd_mixer_elem_t *melem, snd_hctl_elem_t *helem);
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int snd_mixer_elem_empty(snd_mixer_elem_t *melem);
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void *snd_mixer_elem_get_private(const snd_mixer_elem_t *melem);
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size_t snd_mixer_class_sizeof(void);
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/** \hideinitializer
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* \brief allocate an invalid #snd_mixer_class_t using standard alloca
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* \param ptr returned pointer
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*/
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#define snd_mixer_class_alloca(ptr) do { assert(ptr); *ptr = (snd_mixer_selem_id_t *) alloca(snd_mixer_class_sizeof()); memset(*ptr, 0, snd_mixer_class_sizeof()); } while (0)
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int snd_mixer_class_malloc(snd_mixer_class_t **ptr);
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void snd_mixer_class_free(snd_mixer_class_t *obj);
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void snd_mixer_class_copy(snd_mixer_class_t *dst, const snd_mixer_class_t *src);
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snd_mixer_t *snd_mixer_class_get_mixer(const snd_mixer_class_t *class);
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snd_mixer_event_t snd_mixer_class_get_event(const snd_mixer_class_t *class);
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void *snd_mixer_class_get_private(const snd_mixer_class_t *class);
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snd_mixer_compare_t snd_mixer_class_get_compare(const snd_mixer_class_t *class);
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int snd_mixer_class_set_event(snd_mixer_class_t *class, snd_mixer_event_t event);
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int snd_mixer_class_set_private(snd_mixer_class_t *class, void *private_data);
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int snd_mixer_class_set_private_free(snd_mixer_class_t *class, void (*private_free)(snd_mixer_class_t *class));
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int snd_mixer_class_set_compare(snd_mixer_class_t *class, snd_mixer_compare_t compare);
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/**
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* \defgroup SimpleMixer Simple Mixer Interface
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@ -126,14 +174,20 @@ typedef enum _snd_mixer_selem_channel_id {
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SND_MIXER_SCHN_FRONT_LEFT = 0,
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/** Front right */
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SND_MIXER_SCHN_FRONT_RIGHT,
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/** Front center */
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SND_MIXER_SCHN_FRONT_CENTER,
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/** Rear left */
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SND_MIXER_SCHN_REAR_LEFT,
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/** Rear right */
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SND_MIXER_SCHN_REAR_RIGHT,
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/** Front center */
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SND_MIXER_SCHN_FRONT_CENTER,
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/** Woofer */
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SND_MIXER_SCHN_WOOFER,
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/** Side Left */
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SND_MIXER_SCHN_SIDE_LEFT,
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/** Side Right */
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SND_MIXER_SCHN_SIDE_RIGHT,
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/** Rear Center */
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SND_MIXER_SCHN_REAR_CENTER,
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SND_MIXER_SCHN_LAST = 31,
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/** Mono (Front left alias) */
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SND_MIXER_SCHN_MONO = SND_MIXER_SCHN_FRONT_LEFT
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@ -153,9 +207,11 @@ struct snd_mixer_selem_regopt {
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int ver;
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/** v1: abstract layer selection */
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enum snd_mixer_selem_regopt_abstract abstract;
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/** v1: playback PCM connected to mixer device */
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/** v1: device name (must be NULL when playback_pcm or capture_pcm != NULL) */
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const char *device;
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/** v1: playback PCM connected to mixer device (NULL == none) */
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snd_pcm_t *playback_pcm;
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/** v1: playback PCM connected to mixer device */
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/** v1: capture PCM connected to mixer device (NULL == none) */
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snd_pcm_t *capture_pcm;
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};
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@ -204,8 +260,8 @@ int snd_mixer_selem_set_playback_dB(snd_mixer_elem_t *elem, snd_mixer_selem_chan
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int snd_mixer_selem_set_capture_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value, int dir);
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int snd_mixer_selem_set_playback_volume_all(snd_mixer_elem_t *elem, long value);
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int snd_mixer_selem_set_capture_volume_all(snd_mixer_elem_t *elem, long value);
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int snd_mixer_selem_set_playback_volume_dB(snd_mixer_elem_t *elem, long value, int dir);
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int snd_mixer_selem_set_capture_volume_dB(snd_mixer_elem_t *elem, long value, int dir);
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int snd_mixer_selem_set_playback_dB_all(snd_mixer_elem_t *elem, long value, int dir);
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int snd_mixer_selem_set_capture_dB_all(snd_mixer_elem_t *elem, long value, int dir);
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int snd_mixer_selem_set_playback_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int value);
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int snd_mixer_selem_set_capture_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int value);
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int snd_mixer_selem_set_playback_switch_all(snd_mixer_elem_t *elem, int value);
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